Jennifer Hudson has reportedly demanded bosses place a hot water bottle and a cushion on her swivel chair for the blind audition rounds of 'The Voice'.

Jennifer Hudson

Jennifer Hudson

The 'American Idol' star has only just joined the singing competition as one of the mentors alongside fellow newbie Gavin Rossdale, will.i.am and Sir Tom Jones but her diva demands are proving more work than it's worth for producers at the moment.

A source told the Daily Mirror newspaper: "Jennifer insisted on a cushion and also had a hot water bottle on her chair. The other judges were excited by a lot of the acts but Jennifer was less impressed and looked like she'd rather be anywhere else.

"She seemed bored at some points and was given slippers and a blanket by staff."

However, a crew member for the forthcoming series, which will air in January, believes the 35-year-old beauty has hit the ground running since she arrived in the UK.

The member of staff explained: "Jennifer has been a revelation as a coach since she flew over from America. She has hit the ground running and viewers will even see her getting on stage and singing during some of the auditions. The show is looking really different this year and Jennifer is helping it to feel fresh and exciting."

The star may be one of the new mentors on the panel but she's convinced she's at an advantage because she was a contestant herself on 'American Idol' in 2006.

She said recently: "You don't get that much time, so you don't get a chance to rehearse for as long as you want. I know all the setbacks they face, only having one minute and 30 seconds to display your whole world of talent. SO those things I'm considering from my experience and I see it from the same perspective."